The Voyager 1 spacecraft launched in 1977 and is therefore the most remote human object in the universe, until it went dark 5 months ago and NASA engineers feared it lost.

For Oppenheimer's birthday today, there is good news; it has resumed sending engineering updates to Earth. The voyage continues. 

The thing about space is, we can't even be sure it left the solar system, because the definition of solar system has nothing to do with actual space.